The following standard specification is intended to be edited according to the specifics of the project. Brackets [ ] and areas shaded in gray [e.g. format] indicate requirements that are optional depending upon the type of system being provided or per instructions associated with the [ ] and project requirements. Consult with University's Representative and campus stakeholders. DOCUMENT UTILIZES TRACK CHANGES TO RECORD YOUR CHANGES AS YOU EDIT. DO NOT CHANGE THE FOOTER OF THE DOCUMENT Design Professional to check for coordination with LEED requirements, University's Sustainability Initiative and Model Water Efficient Landscape Ordinance for applicable requirements. SECTION 32 90 00 PLANTING PART 1 - GENERAL 1.1 SUMMARY A. Scope of Work: Provide landscape planting, complete in place, as shown and specified including; soil amendment and preparation, finish grading, planting, seeding, staking, header installation, decomposed granite installation, clean-up, and maintenance. B. Related Sections: 1. Section 31 22 19 Landscape Grading 2. Section 32 84 00 Irrigation 1.2 SUBMITTALS A. Submit documentation to University s Representative at least [30] [60] [xxx] days before planting certifying that all plant material is available, listing sources of materials. B. Submittals shall include but not be limited to the following: 1. Fertilizer: Chemical and percentage composition. 2. Mulch: Size, type of material. 3. Amendments: Type, size and composition. 4. Seed: Botanical and common name, percentage by weight, percentages of purity, germination and weed seed for each grass seed species. 5. schedule indicating anticipated dates for planting. 6. Proposed maintenance work schedule. C. Quality Assurance Submittals: 1. Plants shall be subject to inspection and approval by University s Representative at place of growth or upon delivery for conformity to specifications. Such approval shall not impair the right of inspection and rejection during progress of the work. The health and vigor of the plant material is the sole responsibility of Contractor. Submit written request for inspection of plant material at place of growth to University s Representative stating location and quantity of plants to be inspected. D. Plant substitutions requests shall be accompanied by a list of nurseries contacted in the search for the required plant. Requests shall also include sources of plants found that may be of smaller or larger size than specified or different cultivars. No substitutions may be made without approval of the University s Representative. 1.3 PRODUCT DELIVERY, STORAGE AND HANDLING A. Delivery 1. Deliver fertilizer to site in unopened containers bearing manufacturer's guaranteed chemical analysis. 2. Furnish University s Representative with copies of receipts for all amendments. Rev: 1 32 90 00-1
3. Deliver all plants with legible identification labels. a. Label trees, shrubs, bundles of plants, or groundcover plants. b. State correct plant name and size indicated on plant list. c. Use durable waterproof labels with water-resistant ink which will remain legible for at least 60 days. 4. Protect plant material during delivery to prevent damage to root ball or desiccation of leaves. 5. Notify University s Representative 7 days in advance of delivery of all plant materials and submit an itemized list of the plants in each delivery. 6. Seed: Deliver seed in original sealed, labeled, and undamaged containers. 7. Ship and store seed, mulch and fertilizer with protection from weather or other conditions that would damage or impair the effectiveness of the product. B. Storage 1. Store plant material in shade and protect from weather. 2. Maintain and protect plant material not to be planted within 4 hours in a healthy, vigorous condition. C. Handling 1. Contractor is cautioned to exercise care in handling, loading, unloading and storing of plant materials. Plant materials that have been damaged in any way shall be discarded and shall be replaced with undamaged materials at the Contractor's expense. 1.4 COORDINATION AND SCHEDULING A. Perform planting only when weather and soil conditions are suitable in accordance with standards of industry. B. Scheduling: Install trees, shrubs, and liner stock plant material before wood mulch is spread. C. Observation Schedule. Contractor shall notify University s Representative in advance for the following site visits, according to the time indicated: 1. Plant material review at growing site - notify University s Representative at least [30][60] [120] [xxx] days before planting. 2. Pre-job conference - 7 days. 3. Final grade review - 48 hours. 4. Soil preparation. 5. Plant material review - 48 hours. 6. operation and plant layout review - 48 hours. One tree with each type of specified staking shall be approved prior to planting of trees - 48 hours. 7. Pre-maintenance - 7 days. 8. Final acceptance - 7 days. PART 2 - PRODUCTS 2.1 GENERAL A. The following organic, soil amendments and fertilizer are based on typical campus soil composition and establish minimum requirements. Specific amendments and fertilizer amounts will be determined after rough grading operations are complete and soil samples are tested by the Contractor and approved by the University's Representative. The amounts listed in the Preparation section are considered minimum amounts for the project unless directed otherwise by the University Representative. B. All materials shall be of, approved and first-grade quality when installed and accepted. Any commercially processed or packaged material shall be delivered to the site in the original unopened container bearing the manufacturer's guaranteed analysis. Contractor shall supply University s Rev: 1 32 90 00-2
Representative with a sample of all supplied materials accompanied by analytical data from an approved laboratory source illustrating compliance or bearing the manufacturer's guaranteed analysis. 2.2 HERBICIDES A. Non-selective, systemic contact herbicide install per manufacturer s specifications, Roundup, or equal. B. Pre-emergent herbicide (liquid or pelletized) install per manufacturer s specifications, Dimension or equal. 2.3 ORGANIC AMENDMENTS A. Organic amendment shall be nitrogen stabilized wood residual containing 0.56 to 0.84 percent N based on dry weight. B. Particle Size: 1. 95-100 percent passing 6.35 mm standard sieve 2. 80-100 percent passing 2.33 mm standard sieve C. Iron Content: Minimum 0.08 percent dilute acid soluble Fe on dry weight basis. D. Ash: 0-6.0 percent (dry weight). 2.4 COMPOST A. Blended and ground leaf, wood and other plant based material, composted for a minimum of 9 months and at temperatures sufficient to break down all woody fibers, seeds and leaf structures, free of toxic material. B. Compost shall be commercially prepared and meet US Compost Council STA/TMECC criteria. C. Shall comply with the following parameters: 1. ph: 5.5 7.5 2. Soil Salt (electrical conductivity): maximum 3 ds/m (mmhos/cm). 3. Moisture content%, wet weight basis: 30-60. 4. Particle size, dry weight basis: 98percent pass through 3/4 inch screen or smear. 5. Stability carbon dioxide evolution rate: mg CO2 C/g OM/day<2. 6. Solvita maturity test:> 6 7. Physical contaminants, percent dry weight: <1percent. 8. Chemical contaminants, mg/kg (ppm): meet or exceed US EPA Class A standard, 40 CFR & 503.13, Tables 1 and 3 levels. 9. Biological contaminants meet or exceed US EPA Class A standard 40 CFR & 503.32 (a) level requirements. 2.5 SOIL AMENDMENTS A. Soil Sulfur: Agricultural grade sulfur containing a minimum of 99 percent sulfur (expressed as elemental). B. Iron Sulfate: 20 percent Iron (expressed as metallic iron), derived from ferric and ferrous sulphate, 10 percent sulfur (expressed as elemental). C. Gypsum: Agricultural grade product containing 98 percent minimum calcium sulphate. Rev: 1 32 90 00-3
2.6 FERTILIZER A. Fertilizer: Pelleted or granular form shall consist of the following percents by weight and shall be mixed by commercial fertilizer supplier: 1. 16 percent nitrogen 2. 6 percent phosphoric acid 3. 8 percent potash B. Tablets 1. Shall be slow-released type with potential acidity of not more than 5 percent by weight containing the following percentages of nutrients by weight: a. 20 percent nitrogen b. 10 percent phosphoric acid c. 5 percent potash d. 2.6 percent combined calcium e. 1.6 percent combined sulfur f. 0.35 percent iron (elemental) from ferrous sulfate 2. Shall be 21 gram tablets as manufactured by Agriform, Best Tabs, or equal, applied per manufacturer's instructions. C. Sulphate of Potash: 0-0-50. D. Single Super-phosphate: Commercial product containing 18-20 percent available phosphoric pentoxide E. Urea Formaldehyde: 38-0-0. 2.7 IMPORT TOP SOIL A. See Section 312219, Landscape Grading. 2.8 PLANT MATERIAL A. Plants shall be in accordance with the California State Department of Agriculture's regulation for nursery inspections, rules and rating. All plants shall have a normal habit of growth and shall be sound, healthy, vigorous and free of insect infestations, weeds, plant diseases, sun scalds, fresh abrasions of the bark, excessive abrasions, or other objectionable disfigurements. Tree trunks shall be sturdy and have well "hardened" systems and vigorous and fibrous root systems that are not root or pot-bound. Root conditions of the plants provided by Contractor in containers will be determined by removal of earth from the roots of not less than two plants or more than 2 percent of the total number of plants of each species or variety. Where container-grown plants are from several sources, the roots of not less than 2 plants of each species or variety from each source, will be inspected. In case the sample plants inspected are found to be defective, the University s Representative reserves the right to reject the entire lot or lots of plants represented by the defective samples. B. Trees shall have one central leader. If the leader was headed, a new leader (with a live terminal bud at least one-half the diameter of the pruning cut) shall be present. Trunk caliper and taper shall be sufficient so that the lower five feet of the trunk remains vertical without a stake. Temporary branches on the lower trunk of trees should be maintained unless greater than 3/8 inch diameter. Clear trunk should be no more than 50percent of the total height of the tree. The attachment of major/scaffold branches shall be free of included bark. Each tree must include a minimum of three structural roots, reasonably distributed around the trunk (not clustered to one side). The root collar shall be within the upper two inches of the soil. The root system shall be reasonably free of stem girdling roots over the root color or kinked roots from nursery production practices. Rev: 1 32 90 00-4
C. The size of the plants shall correspond with that normally expected for species and variety of commercially available nursery stock or as shown on the Drawings. The minimum acceptable size of all plants measured before pruning with the branches in normal position, shall conform with the measurements, if any, shown on the Drawings. Plants larger in size than specified may be used with the approval of the University s Representative. If the use of larger plants is approved, the ball of earth or spread of roots for each plant shall be increased proportionately. D. All plants not conforming to the requirements herein specified, shall be considered defective and such plants, whether in place or not, shall be marked as rejected and immediately removed from the site of the Work and replaced with new plants at the Contractor's expense. E. Pruning: At no time shall trees or plant materials be pruned, trimmed or topped prior to delivery and any alteration of their shape shall be conducted only with the approval and when in the presence of the University s Representative. F. Plant material shall be true to botanical and common name and variety as specified in "Annotated Checklist of Woody Ornamental Plants in California, Oregon and Washington," published by the University of California School of Agriculture (1979). G. Nursery Grown Stock: 1. Grown under climatic conditions similar to those in locality of project. 2. Container-grown stock in vigorous, healthy condition, not root-bound or with root system hardened off. 3. Use only liner stock plant material which is well established in removable containers or formed homogenous soil sections. 2.9 SEED A. Grass Seed: Fresh, clean, dry, new-crop seed complying with the Association of Official Seed Analysts' "Rules for Testing Seeds" for purity and germination tolerances. B. Seed Mixture: Provide seed of grass species and varieties, proportions by weight, and minimum percentages of purity, germination, and maximum percentage of weed seed as indicated. 1. Seed Mix (at 10 lbs. per 1000 square feet) shall consist of 100 percent dwarf tall fescue varieties. C. Fiber Mulch: Biodegradable dyed-wood cellulose-fiber mulch, non-toxic, free of plant growth or germination inhibitors, with maximum moisture content of 15 percent and a ph range of 4.5 to 6.5. D. Non-asphaltic Tackifier; Colloidal tackifier recommended by fiber-mulch manufacturer for slurry application, non-toxic and free of plant growth or germination inhibitors. 2.10 SOD A. Sod shall consist of 100 percent dwarf tall fescue varieties. 2.11 STAKING MATERIALS A. Lodge pole tree stakes 1. Provide 2 at each new planted tree as per detail. 2. Round and uniform with chamfered top and conical point. 3. 8 or 10 foot by 2 inches as required for height of tree 4. Pressure Treated Douglas Fir 5. Secure tree with tree ties. B. Tree Tie: Rev: 1 32 90 00-5
1. ArborTie Tree Staking and Guying Material, or equal. Soft polypropylene with rounded weave and edge, 3/4 wide strap, break strength of 900 pounds. 2.12 WATER A. Provide or use only from University approved utility water source. 2.13 MULCH A. Shall be 100 percent shredded fir with an average particle size of 2 inches such as Walk On Bark, Redi Gro, Sacramento, or equal. B. In large or hard to access landscape areas pallet mulch may be used if approved by University s Representative - Nor Cal Blend, as supplied by Applied Landscape Materials, Rocklin, CA, or equal. 2.14 WOOD HEADERBOARDS A. Headerboards shall be 2 by 4 inch Redwood construction heart grade. Splices shall be made with 1 by 4 inch and shall not be less than 12 inches in length. Stakes shall be placed at intervals of not more than 4 feet and shall be 1 by 3 by 16 inches "construction heart redwood." All stakes shall be cut with level cut and set below top of headerboard. B. On sharp turns and curves, four 1/2 by 4 inch laminated boards or two 1 by 4 laminated boards may be permitted. C. Stakes and splices shall be nailed with galvanized common nails. Nail as required for solid installation. D. Provide headerboards as shown on the Drawings and herein specified laid true to line and grade, in a workmanlike manner. Care shall be exercised in laying wood headers to protect adjacent improvements, shrubbery and other properties from damage. All stakes shall be placed on the back side of headerboard (away from turf or pavement). 2.13 STEELHEADERS A. Steel Headers shall be 3/16 by 4 inch powder-coated black or galvanized, with 16 inch steel stakes. B. Provide headers as shown on the Drawings and herein specified. They shall be laid true to line and grade, and in a workmanlike manner. Care shall be exercised in laying metal headers to protect adjacent improvements, shrubbery and other properties from damage. All stakes shall be placed on landscape side of header. 2.14 DECOMPOSED GRANITE PAVING A. Size: 1/4 inch minus. Fines shall be evenly mixed throughout the aggregate. Sieve Designation Percent Passing 3/8 100 No. 4 95-100 No. 8 75-80 No. 16 55-65 No. 30 40-50 No. 50 25-35 No. 100 15-25 No. 200 5-15B. Rev: 1 32 90 00-6
B. Color: Gold or Brown. Color to be approved by University s Representative. Submit sample for approval prior to having material delivered. C. Sources: Cascade Rock, Sacramento Gold; Hastie s Capital Sand and Gravel, Sacramento Premium DG; or equal. D. Stabilizer: Non-toxic binder that is a colorless concentrated powder soil solidifier that binds decomposed granite or crushed 3/8 inch or 1/4 inch minus aggregate. E. Contractor to provide delivery tags if pre-mixed. If mixed on site coordinate review and approval of mix operations with University s Representative. 2.15 SAND A. Washed Silica Sand. 2.16 PLANTER DRAINAGE ROCK A. Drainage rock shall be 1/4 inch pea gravel and shall be clean, hard, durable, uniform in quality, and free of any detrimental quantity of soft, friable, thin, elongated, or laminated pieces, disintegrated material, organic matter, oil, alkali, or other deleterious substance. PART 3 - EXECUTION 3.1 INSPECTION A. Obtain University Representative s written acceptance that planting soils have been cleaned of all construction debris, including gravel, concrete, concrete washout, paints, asphalt, etc. See Section 312219 Landscape Grading. B. Obtain University Representative s written acceptance that site soil compaction has been addressed and final grades have been established to within 1/10 foot prior to commencing planting operations. See Section 312219 Landscape Grading. Provide for inclusion of all amendments, settling, etc. Contractor shall be responsible for shaping all planting areas as indicated on Drawings. C. Prior to planting, inspect trees, shrubs and liner stock plant material for injury, insect infestation and trees and shrubs for improper pruning. D. Do not begin planting of trees until deficiencies are corrected or trees are replaced. E. All finish grading, soil preparation and irrigation work must be complete and accepted (included irrigation coverage test) prior to the installation of any plants. 3.2 PLANTING INSTALLATION A. General 1. Only as many plants as can be planted and watered on that same day shall be distributed in a planting area. 2. Containers shall be opened and plants shall be removed in such a manner that the ball of earth surrounding the roots is not broken and they shall be planted and watered as herein specified immediately after removal from the containers. Containers shall not be opened prior to placing the plants in the planting area. B. Pre-plant Weed Control Rev: 1 32 90 00-7
1. If live perennial weeds exist on site at the beginning of work, spray with a non-selective systemic contact herbicide, as recommended and applied by an approved licensed landscape pest control advisor and applicator. Leave sprayed plants intact for at least 15 days to allow systemic kill. Clear and remove these existing weeds by mowing or grubbing off all plant parts at least 1/4 inch below the surface of the soil over the entire area to be planted. 2. After irrigation system is operational, apply water for 5 to 10 days as needed to achieve weed germination. Apply contact herbicides and wait as needed before planting. Repeat, if required by University s Representative. 3. Maintain site weed free until final acceptance by the University's Representative. C. Soil Preparation 1. After approximate finished grades have been established, soil shall be conditioned and fertilized in the following manner. Amendments shall be uniformly spread and cultivated thoroughly by means of mechanical tiller into the top 12 inches of soil. 2. Application Rates: (Per 1,000 square feet): The following organic, soil amendments and fertilizer establish minimum requirements. Specific amendments and fertilizer amounts will be determined after rough grading operations are complete and soil samples are tested by the Contractor and approved by the University's Representative, see Section 312219 Landscape Grading. The amounts listed below are considered minimum amounts for the project unless directed otherwise by the University Representative. Delivery tags for all specified amendments shall be provided to University s Representative prior to installation. a. Nitrogen stabilized organic amendment or compost 6 cubic yards for groundcover and shrub beds, 3 cubic yards for lawn areas. University's Representative may request delivery tags. b. fertilizer - 15 lbs. c. Gypsum - 20 lbs. d. Soil sulphur - 20 lbs. e. Iron 2 lbs. D. Layout of Major s: Locations for plants and outlines of areas to be planted shall be marked on the ground by Contractor before any plant pits are dug. All such locations shall be approved by the University s Representative. If underground construction or a utility line is encountered in the excavation of planting areas, other locations for planting may be selected by the University s Representative. E. of Trees and Shrubs: 1. Excavation for planting shall include the stripping and stacking of all acceptable topsoil encountered within the areas to be excavated for trenches, tree holes, plant pits and planting beds. 2. Excess soil generated from the planting holes and not used as backfill or in establishing the final grades shall be removed from the site. 3. Protect all areas from excessive compaction when trucking plants or other material to the planting site. 4. All excavated holes shall have vertical sides and shall be of a size that is three times the diameter and 1 and 1/2 times the depth of the root ball for all trees and shrubs. After pits are dug, roughen the sides of the pit and loosen soil in the bottom of the pit to a depth of 3 inches. Construct foot-tamped mound in the bottom of the pit to support the plant at the proper level. 5. All prepared tree pits must be reviewed and approved by the University s Representative prior to the planting of any trees. 6. Percolation tests are required for 1 out of every 5 trees planted, for and every bioswale or stormwater collection feature on a given site. Tree pits from each planting area of the project Rev: 1 32 90 00-8
shall be tested for percolation. However, in areas where over-excavation of a building foundation has occurred, or any other construction practice typically resulting in extremely compacted subsoil conditions, all tree pits must be tested for percolation. Tree pits and bioswales shall be filled with water and the drainage rate observed. Percolation rate shall be a minimum of the depth of the tree pit or bioswale within 24 hours. If percolation/drainage rate is less than that - mitigation measures shall be implemented (see Soil Cleanup, Replacement and Preparation paragraph above). 7. Do not handle container plants by the tops, stems or trunks at any time. Lift all plants so that the root ball is supported from the underside. 8. Plants that do not have a satisfactory root system may be rejected at the discretion of the University s representative The outer surfaces of plants and trees shall be shaved to remove all circling, descending, and matted roots. Shaving shall be performed using saws, knives, sharp shovels or other equipment that is capable of making clean cuts on the roots. University s Representative must be contacted prior to root pruning all trees in order to coordinate observation of root pruning practices with the Campus Arborist. Modifications required to make the root system of plants and trees conform to plant quality standards shall not be considered as grounds to modify or void the plant warranty. 9. Center plant in pit or trench. Crown of trees shall be 1 inch minimum above finish grade. Crown of shrubs shall be 1 inch above finish grade. 10. Face plants with fullest growth into prevailing wind. 11. Set plant plumb and hold rigidly in position until soil has been tamped firmly around ball or roots. 12. Backfill for trees and shrubs shall consist of amended native soil. If native soil is unsuitable or contaminated, use imported topsoil as specified above. 13. All plants which settle deeper than the surrounding grade shall be raised to the correct level. After the plant has been placed, additional backfill shall be added to the hole to cover approximately 1/2 of the height of the root ball. At this stage, water shall be added to the top of the partly filled hole to thoroughly saturate the root ball and adjacent soil. 14. Container Removal: a. Cut containers on 2 sides with a can cutter designed for the job. b. Do not injure root ball. c. Do not cut containers with spade or ax. d. After removing plant, superficially cut edge roots with knife on 3 sides. 15. Box Removal: a. Remove bottom of plant boxes before planting. b. Remove sides of box without damage to root ball after positioning plant and partially backfilling. 16. Plant Tablets: a. After the water has completely drained, planting tablets shall be placed as indicated below. 1) Two tablets per 1-gallon container. 2) Four tablets per 5-gallon container. 3) Six tablets per 15-gallon container. 4) Ten tablets per 24 inch box. 5) Fourteen tablets per 36 inch box. 6) Eighteen tablets per 48 inch and those box sizes which are larger. b. tablets shall be set with each plant on top of the root ball while the plants are still in their containers so the required number of tablets to be used in each hole can be easily verified by the University s Representative. 17. Backfill a. The remainder of the hole shall then be backfilled with 2/3 native soil and 1/3 organic amendment thoroughly blended and tamped firm. Rev: 1 32 90 00-9
b. After backfilling, an earthen basin shall be constructed around each plant. Each basin shall be of a depth sufficient to hold at least 2 inches of water. The basins shall be constructed of amended backfill materials. Remove basin in all turf areas after initial watering. 18. Pruning shall be limited to the minimum necessary to remove injured twigs and branches, and to shape the plant material as directed by the University s Representative. Pruning shall not be done prior to delivery of plants. 19. Staking: Staking of all trees shall be completed immediately after planting. All stakes shall be installed as indicated in Drawing details. F. of Groundcovers: 1. Groundcover plants shall be grown in flats or gallon containers as indicated on the Drawings. Flat grown plants shall remain in those flats until transplanting. The flat's soil shall contain sufficient moisture so that it will not fall apart when lifting the plants. 2. Groundcover shall be planted in straight rows and evenly spaced, unless otherwise noted, and at intervals called out in the Drawings. Triangular spacing shall be used unless otherwise noted on the Drawings. 3. Each rooted plant shall be planted with its proportionate amount of flat or container soil. s shall be immediately sprinkled with water after planting until the entire area is soaked to the full depth of each hole. 4. Care shall be exercised at all times to protect the plants after planting. Any damage to plants by trampling or other operations shall be repaired immediately. G. Mulch 1. All groundcover, perennial, and shrub beds shall be dressed with a 3 inch layer of mulch, where slopes are not steeper than 2:1. 2. Pre-emergent weed control product shall be applied to all planting areas after completion of planting and prior to mulch application. Use Dimension, or equal and apply per manufacturer s recommendations. H. Lawn 1. Seeded Lawn (see pre-plant weed control) a. Install soil amendments and finish grading as specified. Allow for settlement. b. Broadcast seed evenly at the rate of 12 pounds per 1000 square feet. c. Rake seed bed lightly to cover seed with soil. d. Cover seed with 1/8 inch to 1/4 inch layer of amended soil. Seed cover shall not exceed 1/4 inch. e. Roll seedbed with 200 pound roller. Finished surface shall meet finish grades shown. f. Water thoroughly. g. At end of maintenance period, lawn shall be dense, uniform, healthy and free of weeds, diseases or bare spots. h. At Contractor s option, lawn may be hydroseeded. 2. Hydroseeding a. Mix specified seed, fertilizer, and fiber mulch in water, using equipment specifically designed for hydroseed application. Continue mixing until uniformly blended into homogenous slurry suitable for hydraulic application. b. Mix slurry with non-asphaltic tackifier. c. Apply slurry uniformly to all areas to be seeded in a one step process. Apply mulch at the minimum rate of 1500 pound per acre dry weight but not less than the rate required to obtain specified seed-sowing rate. d. Acceptance of all seeded areas will be based on growth of a uniform color and dense stand of grass, without bare spots of over 4 inches square. If grass is not established prior to the end of the maintenance period Contractor shall provide an additional Rev: 1 32 90 00-10
hydroseed application and shall continue maintenance until seeded areas are accepted by the University's Representative. 3. Sod a. Lay sod immediately upon delivery. b. Finish grade sodbed to remove ridges and depressions. Roll with 200 pound roller. c. University's Representative will review and approve sodbed before installation. d. Butt strips tightly together. Stagger joints. e. Roll sod after installation with 200 pound roller. f. Water thoroughly. g. At end of maintenance period, lawn shall be dense, uniform, healthy, and free of weeds, diseases or bare spots. 3.4 HEADERBOARD INSTALLATION A. Wood and Steel Headers: 1. Headers: Install header true to line and grade as shown on the Drawings. Align header edges and set flush with adjacent paving. 2. Stakes: Stakes shall be a minimum of 12 inches long for wood and 16 inches for metal, and longer as required for solid anchorage. 3. Header is not required where perimeter of decomposed granite is bounded by a concrete curb or slab. 4. Landscape edging is to remain in place, securely staked to hold firmly to approved line and grade. 5. After finished compacted path surface has been achieved, finish adjacent shoulder by backfilling back of header with stockpiled topsoil, compacting to match existing undisturbed ground and slope to required grade and cross section. 3.5 DECOMPOSED GRANITE PAVING A. Decomposed Granite Paving: 1. Install decomposed granite on the prepared sub base in two lifts of equal depth, or one 2 inch lift over 2-3 inches of compacted aggregate base per the Drawing details. 2. Thoroughly compact each lift to a minimum 90 percent. Compact each area with at least 4 passes of the compacting equipment. Hand tamp edges around benches, signposts etc. After compacting, screed smooth. 3. Level and water so that moisture permeates the full depth to further compact the decomposed granite and determine correct finish grades. Watering is best accomplished using a garden hose with spray nozzle set to a coarse spray; pressure shall not disturb leveled path surface. Add sufficient water to thoroughly wet decomposed granite without excess free water. 4. Correct any deficiencies or low spots by adding additional decomposed granite material and re-compacting the area(s) with both equipment and water application. The previously rolled or compacted area shall be raked to provide a bond with the added material. B. Stabilized Decomposed Granite Paving: 1. Thoroughly and uniformly blend 16 pounds of stabilizer per 1-ton of decomposed granite. Bucket blending or rake blending is not acceptable. Blend material dry. 2. Install decomposed granite per above specifications. Rev: 1 32 90 00-11
3. Grade, contour and compact the decomposed granite to final elevations. 4. Water heavily after each lift is installed for full-depth moisture penetration. 25-45 gallons of water per 1 ton shall be applied. 5. Upon moisture penetration compact each decomposed granite lift to 85 percent relative compaction with a steel drum roller. 6. In the event of damage or defective installation the contractor shall repair and replace in accordance with these Specifications at no additional cost to the University. 3.6 CLEAN UP A. During the progress of the Work, the Contractor shall keep the Project site in a neat and clean condition that is free of debris to the satisfaction of the University's Representative. All materials and debris accumulated in conjunction with completing this Work shall be legally recycled or disposed of by Contractor off campus. Refer to Section 017400 Cleaning and Waste Management. Remove all trash, excess soil, empty plant containers and rubbish from the property. All scars, ruts or other marks in the ground caused by this work shall be repaired and the ground left in a neat and orderly condition throughout the site. B. The Contractor shall leave the site area broom-clean and shall wash down all walkways and other paved areas, leaving the premises in a clean and safe condition. C. Promptly remove soil and debris created by hydroseed work from paved areas and building walls. Clean wheels of vehicles before leaving site to avoid tracking soils onto surfaces of roads, walks, or other paved areas. 3.7 MAINTENANCE & PLANT ESTABLISHMENT A. General: Maintain all plants and planting areas from time of delivery, through installation and maintenance period, until final acceptance. B. Schedule: Submit proposed maintenance work schedule to University's Representative in writing for review at least 30 days prior to commencement of maintenance work. Maintenance work shall be done at times accepted by University. Contractor s maintenance crew must be present at the project site at least once a week and as often as necessary to perform specified maintenance. C. Maintenance Procedures 1. General: Maintenance of new planting includes but is not limited to watering, cultivating, fertilizing, weeding, mulching, re-staking, resetting plants to proper grades or upright positions, restoring watering basins, maintaining lawns, removal of dead flowers and broken twigs, pest, disease and weed control, erosion control, restoring finish grades with accepted and tested imported topsoil, and taking precautions as necessary to prevent sunscald damage. Remove nursery tags and repair mulch 10 days before final acceptance. 2. Lawn maintenance: Lawns shall be mowed to a height of 2 inches when reaches a height of 3 inches. Lawns must be mowed a minimum of two times during maintenance period. Edges must be trimmed at least twice a month and all grass clippings removed and disposed of. 3. Young tree pruning shall be conducted during the maintenance period by the Contractor as approved by the University s Representative after review by the Campus Arborist and in accordance with the University s standard tree pruning practices. Refer to Section 01 56 39 Tree and Plant Protection. Trees shall be pruned to encourage the growth of strong central leaders where applicable. Contractor shall notify University s Representative 48 hours in advance of any pruning operations. 4. Protection: Protect planting areas and plants against damage until final acceptance. Maintenance also includes temporary fences, barriers, and signs as required for protection. Treat or replace damaged plants as directed by University's Representative at no additional cost to University. Rev: 1 32 90 00-12
5. Fertilization: Apply potassium sulfate and 16-6-8 fertilizer at the rate of 6 pounds each per 1000 square feet, 30 days after installation. 6. Weed control: a. Keep site free of weeds during maintenance period. b. Identify weeds and apply accepted control methods. c. Herbicides, if used, shall be applied by licensed Pest Control Operator according to manufacturer s recommendations. D. Observation for Maintenance Period Commencement: Request after work of this section and Section 32 84 00 Irrigation is substantially complete. Maintenance Period shall begin upon written notice of acceptance by University's Representative and shall continue for a minimum of [60] [90] days until final acceptance by University s Representative. END OF SECTION 32 90 00 Rev: 1 32 90 00-13